Lines 55–56, “a heavy weight of hours has chained and bowed / one too like thee: tameless, and swift, and proud,” mean that the speaker — a. has lost hope of ever capturing the wind’s qualities b. feels he is even mightier than the wind c. thinks of every human soul as the wind’s brother or sister d. feels that his spirit resembles the wind

The lines are from Ode to the West Wind by Percy Bysshe Shelley. And they mean that time has weighed down his spirit, that previously was "tameless, and swift, and proud"

So the answer is d. feels that his spirit resembles the wind

d. feels that his spirit resembles the wind

Explanation:

In these lines from Ode to the West Wind by Percy Bysshe Shelley, the time has burdened his soul, that recently was "tameless, and swift, and proud".  

Percy Shelley makes a speaker that appears to revere the breeze. He generally alludes to the breeze as "Wind" utilizing the capital letter, recommending that he considers it to be his god. He applauds the breeze, alluding to its quality and may in tones like the Biblical Psalms which adore God. He additionally alludes to the Greek God, Dionysus.

The speaker keeps on applauding the breeze and to entreat it to hear him. When he is fulfilled that the breeze hears him, he asks the breeze to remove him in death, with the expectation that there will be another life hanging tight for him on the opposite side.

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the words "strangest" and "unusual" suggest (: